[C# 14-Tutorials]: New Feature - Use new Extensions in samples and snippets

[BillWagner]

Visual Studio release

17.14.p3

Link to speclet

• Speclet

Link to Pull request

• PR

New behavior

Static classes can include extension containers. These provide new syntax for extension members.

New tutorials

We have a large number of samples that demonstrate extension members. After the G.A. release in November, we should update most of them to use and show the new syntax as the preferred syntax moving forward.

For historical reasons, we should continue to show the existing this syntax.